my cat is licking his belly and it is so red and very sore looking, he recently stopped going out doors on a regular basis, I believe something scared him about 6 or more weeks ago, and he supposedly had a abscess on his left hip the vet said and was on antibiotic for a week, any ideas of could it be cystitis? He doesn't seem to have a problem going so I am only guessing by reading things on the great old internet?